What potential error could occur when using the fetch_array() function on a MySQLi_Result object in PHP?

When using the fetch_array() function on a MySQLi_Result object in PHP, a potential error that could occur is trying to access the result set without checking if there are any rows left to fetch. This can lead to a null or false value being returned, causing unexpected behavior in your code. To solve this issue, you should always check if there are more rows to fetch before calling fetch_array(). 

// Check if there are rows left to fetch before calling fetch_array()
if ($result->num_rows > 0) {
    while ($row = $result->fetch_array()) {
        // Process the fetched row
    }
} else {
    echo "No rows found.";
}

Keywords

fetch_array MySQLi_Result PHP error handling data retrieval

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